The 36-year-old actress, best known for her roles in "Mean Girls," "Mamma Mia," and "Jennifer's Body," happily reminisced in the halls of Allentown's William Allen High School.
It was her first trip back since graduating in 2003.
"On Friday we welcomed a very special alumni back to William Allen HS - Amanda Seyfried," the Allentown School District said on Facebook.
"Amanda visited the school for the first time since 2003 and also brought her uncle (WAHS Class of '73) back for a trip down memory lane!"
She is a mother of two children and has won a Satellite Award for Best Cast in Motion Picture for her role in the musical film "Les Miserables."
Click here to follow Daily Voice Lower Merion-Narberth and receive free news updates.